Install the game files
Method 1: Rapid (Recommended)

    Install python/pip and rapid downloader
    Run:

    sudo apt-get install python-dev python-setuptools python-pip
    sudo easy_install rapid-spring
    rapid pin zk:stable

    To upgrade run:

    rapid clean-upgrade

Method 2: Download the game file manually

    This option means each game update = full game redownload
    Put latest version from here to ~/.spring/mods 

Method 3: Install the game - from sources

    Get svn sudo apt-get install subversion
    Checkout source from site:

    svn co http://zero-k.googlecode.com/svn/trunk/mods/zk zk.sdd

    Make a link to spring so you can play it any time:

    ln -s zk.sdd ~/.spring/mods

Start Playing!

    Run the application "SpringLobby", which will give you options for multiplayer or single player against bots
    Make sure to join the official Zero-K channel after starting the lobby: /join #zk 